Crayon and method of making the same



Patented Aug. 15, 1933 PATENT OFFICE CRAYON AND METHOD OF MAKING THE SAME Leonard R. Phillips, New York, N. Y.

No Drawing. Application July 23, 1929 Serial No. 380,470

4 Claims.

This invention is an improvement in crayons, and in methods of making the same, and more particularly in a type of colored crayon designed for drawing permanent designs on silk, rayon, and

5 the like.

One of the primary objects of the invention is the provision of a crayon, in various colors, of a nature such that when abraded upon specially treated silk or the like, by the drawing of a design, a permanent impression of the design will be left upon the silk.

Another object is the provision of a method of making crayons, of the character in question, in various colors. The improved crayon is composed of chalk, dye, and a binder, such as dextrin. It is made by soaking pure chalk powder in a permanent dye, such as an aniline dye, and molding it into crayone, with a binder of dextrin.

In making the improved crayon, pure chalk in the proportion of about 500 parts, is thoroughly permeated with one to four parts of dye of a suitable character in alcoholic solution, a binder such as dextrin, in the proportion of about ten parts, being used to assist in the molding of the chalk into sticks.

The chalk particles should havea porous structure, giving a very large adsorption surface for the dye, which preferably is an alcoholic solution of aniline dye of the desired color.

While the preferable method of making the crayons is to permeate the chalk in a powdered condition, the dye may be added after the molding of the chalk and binder into sticks. In this event, substances of a suitable nature to assist penetration of the dye may be used, as for instance, butanol. These substances not only assist in the penetration of the dye, but they retard the drying, and make it more uniform. The butanol when used, assists penetration, but substantially the same results may be obtained without butanol, by extending the time of soaking. The chalk is dried in air, or in ovens, as may be desired.

Crayons so obtained are used in the following manner. The fabric, such as silk, rayon or the like, is moistened over the part which is to re ceive the design. The design is then drawn upon the cloth with the crayon, it being understood that the design may be in several colors, if de- 50 sired. A portion of the chalk is abraded from the stick by the rubbing upon the fabric, and these abraded pbrtions, of infinitesimal size, yield up their dye to the moistened fabric. After drying, the chalk particles may be brushed away, if desired, leaving the design in the form of a permanent impression upon the fabric. Dye applied with the improved crayons is less likely to bleed, than if applied in any other manner, and it is not removed by washing.

It will be understood that the fabric is stretched prior to the application of the design. It may be moistened before or after stretching, and is moistened over substantially the area to be cccupied by the design.

While it is stated that the fabric is stretched prior to the application of the design, this is not essential in all cases, but is a matter of choice with the designer. It is apparent that the design might be drawn by mechanism suitable for the purpose instead of manually.

The particles of chalk also absorb moisture from the cloth, thus making a definite flow of moisture into the mark or design, removing any likelihood of the color running or bleeding.

What is claimed as new is:-

l. The method of making crayons for use in drawing on moistened fabrics, which consists in uniformly permeating powdered chalk with an alcoholic solution of an aniline dye, combining the permeated chalk with a binder of dextrine, and molding into shape. 7

2. In the method of making crayons for use in drawing on moistened fabrics, and containing powdered chalk, a permanent dye, and a binder of dextrine, the step of uniformly permeating the chalk with an alcoholic solution of the dye.

3. A crayon for use in drawing on moistened fabrics to permanently color the same, and comprising powdered chalk, a dextrine binder, and an aniline dye, combined and molded in accordance with the method set forth in claim 1.

4. A crayon for use in drawing on moistened fabrics to permanently impart thereto color designs comprising approximately 500 parts of powdered chalk uniformly permeated with permanent dye, by the method of claim 2 and approximately 20 parts of dextrine mixed with the permeated chalk and molded to shape.

LEONARD R. PHILLIPS. 

